Alfred f



A. F. SCIUTO SPARK PLUG Filed Jan. 19, 1929 Feb. 3, 1931.

I wir Patented Feb. s, 1931 .ALFRED r. sommo, or sfr. Louis, nisse-usr l SPARK `PLUG f vApplication led January 19, 1952.9.;l Serial N o. 333,535.

My invention relates to spark plugs and more particularly to spark plugssuch as are commonly used to ignite a fluid fuel in internal combustion engines, oil burners, or similar devices.

Heretofore if the sparking points forming the spark gap in spark plugs of this type became carbonized or dirty through anyother reason the pluo would not operate. Socalled intensifiers of:` various constructions have been used to intensify or raise the voltage of Y the circuit from the spark coil to such an eX- tent that a spark will be made to jump between even carbonized or fouled plug points. However, such an intensified spark while it will jump across even fouled points is, of course, comparatively thin and, therefore, will not ignite the fluid fuel as quickly as the comparatively thick spark resulting from a plug in which an intensifier is not used.

The object of this invention is to remove this deficiency of structure and to create a spark plug combining the good qualities of both types of spark plugs.

ing drawing wherein similar characters are used to designate similar parts: Fig. l is a sectional view of a spark plug embodying my invention; Figs. 2 and 3 are cross sections along the lines 2 2 and 3 3, respectively, in Fig. 1'; Fig. 4 is a sectional view of a somewhat modified form; and Fig. 5 is a cross section along the lines 5 5 in Fig. 4.

Referring tothe figures, Figs. l, 2 and show my invention adapted to an integral plug while Figs. 4 and 5 show my invention adapted to a usual separable plug. Referring to the form of Figs. 1, 2 and 3 the plug coniprises a shell 1 in which is mounted the core 2, of porcelain, mica, or other similar non-'conducting material. Between lthe shell land the core 2 are the usual gaskets 3, preferably of metal. Extending through the core 2 is an electrode 4 which has an enlarged upper end 5 preferably threaded in the upper end of the core 2, for the purpose more fully liereinafter disclosed. On the upper end of the head 5 is a washer 6 fitted over the upper end of the core 2, a lock nut 7 and the parts 8 lated by loosening .and-9 betwe'engwhrich is clamped the terminal i of 'a wire through" which' electricity is lsupplied 'to the plug. Y nthel'ower end of the plug 'isa pin 10 preferably arranged at vsubstantially right anglestothe electrode and lspaced therefrom a ydistance tov form asp'ark gap 1l. In this type ofplug the shell 1` is grounded andjcarrfies sparking points 121er` ranged 'to form spark `gaps 1'3 :at Athcends of the pin 10. I Aprefer tfhat'thfe lower fend 'of' the lrole through the ic'o're '2 in which the electrode 4 is mounted be enlarged, as showin', so

t'hjat 'both 'the' spark gaps 11 and 13V will be fully *exposed "to the flui'dto'be ignited 'Thefsize-'of Lthe spark gap 11 may byereguthe lock nut 7 andt'lien turning the electrode 4 so that the head 5 ithreaded in the upper end ofthe core l2 will be raised er lowered, as desired, and in turn the Elower end of the electrode 4 will `lie-moved away from or toward the pin 10. The 1size ofthesp'ark gaps V13'may be regulatedby j bending the 'sparking points 12 away freiner With these and other objects in view my invention is fully Vshown in the accompany .may be removedif itis desired 'to take the spark plug apart.: Apair of pins 15 having their inner ends bifurcated as at 16 are pro-v eov vided. Each ofthe pins forms a spark gap 17 with thevlower end of the electrode 4 and aspark gap 13a with the sparking points 12 carried by theshell 1. The size of the sparkC gap 17 may be regulated by bending the bifurcated portions 16.

In both forms of my invention it maybe readily seen that both the intensifying sparktlo and the resultant intensified spark are ex?" posed to the iluidto be ignited by the plug and, therefore, the plug embodyingv my invention includes the good features'of both types of plugs as heretofore made. 95

It may be readily understood that a spark plug embodying my invention may be made in various forms and shapes without deviating from the spirit of my invention as included'in the claims set forth below.

What -I claim as new and desire to secure by Letters Patent, is

1. A spark plug comprising a core of nonconducting material, an electrode extending longitudinally through said core, a grounded y shell, said core extending downwardly be-A low said shell, a pin extending transversely] through said core below said shell-with the ends thereof projecting outwardly from the sides of said core, and said pin and said electrode being positioned' and arranged whereby a spark will jump from said electrode to said .v

pin and from saidvpin to sparking points carried by said shell.

2. A spark plug comprisnga core of non; l

conducting material, an electrode extending longitudinally through said core, a` grounded shell, said core extending downwardly below said shell, a pin extending transversely of said core below said shell and below the lower end of said electrode at substantially right angles thereto, and said pin and said electrode being otherwisel positioned and arranged whereby a spark will jump Jfrom said electrode to said pin and from said pin at both ends thereof to sparking points carried by said shell.

3. A spark plug comprising a core of nonconducting material, an electrode extending through said core, a grounded shell, a pin extending transversely of said core below the lower end of said electrode and substantially at right angles thereto, and said pin and said electrode being otherwise positioned and arranged whereby a spark will jump from said electrode to said pin and from said pin at both ends thereof to sparking points carried by said shell, and said electrode` being arranged in said core so as to be adjustable longitudinally therein whereby the sparking gups between said electrode and said pin may regulated.

In witness whereof I have signed myname to the foregoing specification. v

ALFRED F. soIU'ro. *Y 

